Improvement in padlocks



durch trlr5 haar effin.

GEORGE MERKEL AND CHARLES H. MEYER, OE NEW YORK, N. Y.

Letters Patent No..113,322, datedl April 4, 1871.

IMPROVEMENT IN PDLOCKS.

The Schedule referred to in these Letters Patent and making part ofthesame.

To all whom it may concern:

Be it known that we,- GEORGE MERKEL ,and CHARLES H,` MEiiER, of thecity, county, and. State of New York, have invented anew and improvedPadlock, and we do' hereby declare that the following is afull, clear,and exact description thereof, which 'will enable others skilled Vin theart to make and use thesame, reference being had tothe accompanyingdrawing forming part of this specification, in which- Figures l and 2represent face views, partly in section, ot' our improved lock.

Figure 3 is a transverse section of the same taken on the line x kc,iig. 1.-v

Figures 45and 6 are detail views of holt, plate, and tumbler. v

Similar letters of reference indicate corresponding parts.

This invention relates to a new padlock, and has for its object to makethe picking' of the same more diiicult .than an ordinary padlock, andalso to facilitate the operation of the "same by the rightkey.

Our invention consists in a new way of constructing and combining theswinging bolt, tumbler,-and sliding plate in a padlock. v

We'will .now describe our invention, in connection with all that isnecessary to a full understanding thereof', and then point it outclearly in the claim.

Ain the drawing represents the case or shell of our improved padlock.

a is the face-plate of the same.

b is the hasp of the lock, vpivoted in suitable manner, and locked by abolt, B.

The bolt B is hook-shaped, and is pivoted to the back of the lock by apin, c.

A spring, el, acts on the bolt to swing itthrough the eye or notch of`the hasp for locking the same.

Above the bolt is arranged, within the lock, a tumbler, C, pivoted tothe case by a pin, c, on which it can swing, and held toward the key 'bya spring, f. One or more tumblers maybe employ ed if desired.

Above the face of the outermost tumbler is placed an immovable plate, D,whichiis fitted upon both' pins c and e so that it cannot he turned normoved lengthwise.

E is a slotted plate, placed upon the face of 'D, so tha* the pins c elit through its long slot.

lt has branches 'g and It in said slot, as shown in igs. 1 and 2;

A spring, r', acts against one end of the plate E,v

and tendsv to hold the same, so that the pin eis at the extreme endofthe long slot, `as4 in Iig. 1.

From the bolt B projects a pin, j, into the slotted plate E.,

A'pin, It, projects also from the tumbler, or 4each tumbler, into saidplate E.

After the key has been properly-inserted in the" l post its narrowportion l will be inline with the faceplate, clearing the slot of thesame and allowing the key to be turned with the post E.

When locked the bolt enters the hasp, as in g. 1,

and its pin j is in the straight slot of the plate E,

while the pin k of the tumbler is i-n the lower curved slot 7L of saidplate E, all as in fig. 1.

The rst action ofthe key will be to elevate the tuinblers so as to raisethe pin or pins k ont ofthe lower slots, which prevent the sliding ofthe plate E. The key therefore swings the tumblers on theV pivot e tilltheir pins k are in" line with the longslot of E. It next-strikes anarm, m, of the plate E, yand moves the latter' longitudinally until theping of the bolt is in line with the upper-branch-slot g. 'The bolt canthen be swung by the key, which strikes anarm, n, of the same, carryingthe pin j into the .slot g, and

vwithdrawingthe bolt from the hasp so thatrthe lat'- ter can be swnngopen, as in iig. 2, In this position the .parts are'held'byaspri'ng, o,which 'holdsthe bolt open. When the hasp is forced into push the springo clear of the bolt, the pax-ts will all spring hack to the positionshown in iig. 1, being thus automatically locked.

By means of the swinging bolt, swinging tumbler, andY sliding plate, avariety of movements is produced, which makes the opening of the lock,otherwise than by the right key, very difficult, while with the properkey it is an easy matter.

The grooved swivel-post F is afurther ,guarantee for the safety. of thelock, as Vit requires the application of a nearlyfcorrect key before itcan be turned 'with anyl prospect of reaching the tumbler', bolt, and

slide.

,Having thus described our invention,

We `claim as new and desire to secnrehy Letters Patent- The combination,within one lock, of the lswinging bolt B, tumbler' C, and .sliding plateE, the boltand tumbler having projectingl .pins that pass through slotsin the plate E, as set forth.

Gr.k MERKEL. G. H. MEYER.

Witnesses Fenu. Bosca, CHARLES HENKEL.

